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177 lines
5.2 KiB
177 lines
5.2 KiB
/* |
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* Copyright (C) 2014 Texas Instruments Incorporated |
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* Authors: Sandeep Nair <[email protected] |
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* Cyril Chemparathy <[email protected] |
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Santosh Shilimkar <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation version 2. |
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* |
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether express or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#ifndef __SOC_TI_KEYSTONE_NAVIGATOR_DMA_H__ |
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#define __SOC_TI_KEYSTONE_NAVIGATOR_DMA_H__ |
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/* |
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* PKTDMA descriptor manipulation macros for host packet descriptor |
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*/ |
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#define MASK(x) (BIT(x) - 1) |
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#define KNAV_DMA_DESC_PKT_LEN_MASK MASK(22) |
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#define KNAV_DMA_DESC_PKT_LEN_SHIFT 0 |
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#define KNAV_DMA_DESC_PS_INFO_IN_SOP BIT(22) |
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#define KNAV_DMA_DESC_PS_INFO_IN_DESC 0 |
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#define KNAV_DMA_DESC_TAG_MASK MASK(8) |
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#define KNAV_DMA_DESC_SAG_HI_SHIFT 24 |
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#define KNAV_DMA_DESC_STAG_LO_SHIFT 16 |
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#define KNAV_DMA_DESC_DTAG_HI_SHIFT 8 |
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#define KNAV_DMA_DESC_DTAG_LO_SHIFT 0 |
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#define KNAV_DMA_DESC_HAS_EPIB BIT(31) |
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#define KNAV_DMA_DESC_NO_EPIB 0 |
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#define KNAV_DMA_DESC_PSLEN_SHIFT 24 |
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#define KNAV_DMA_DESC_PSLEN_MASK MASK(6) |
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#define KNAV_DMA_DESC_ERR_FLAG_SHIFT 20 |
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#define KNAV_DMA_DESC_ERR_FLAG_MASK MASK(4) |
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#define KNAV_DMA_DESC_PSFLAG_SHIFT 16 |
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#define KNAV_DMA_DESC_PSFLAG_MASK MASK(4) |
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#define KNAV_DMA_DESC_RETQ_SHIFT 0 |
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#define KNAV_DMA_DESC_RETQ_MASK MASK(14) |
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#define KNAV_DMA_DESC_BUF_LEN_MASK MASK(22) |
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#define KNAV_DMA_NUM_EPIB_WORDS 4 |
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#define KNAV_DMA_NUM_PS_WORDS 16 |
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#define KNAV_DMA_NUM_SW_DATA_WORDS 4 |
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#define KNAV_DMA_FDQ_PER_CHAN 4 |
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/* Tx channel scheduling priority */ |
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enum knav_dma_tx_priority { |
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DMA_PRIO_HIGH = 0, |
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DMA_PRIO_MED_H, |
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DMA_PRIO_MED_L, |
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DMA_PRIO_LOW |
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}; |
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/* Rx channel error handling mode during buffer starvation */ |
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enum knav_dma_rx_err_mode { |
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DMA_DROP = 0, |
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DMA_RETRY |
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}; |
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/* Rx flow size threshold configuration */ |
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enum knav_dma_rx_thresholds { |
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DMA_THRESH_NONE = 0, |
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DMA_THRESH_0 = 1, |
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DMA_THRESH_0_1 = 3, |
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DMA_THRESH_0_1_2 = 7 |
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}; |
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/* Descriptor type */ |
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enum knav_dma_desc_type { |
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DMA_DESC_HOST = 0, |
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DMA_DESC_MONOLITHIC = 2 |
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}; |
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/** |
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* struct knav_dma_tx_cfg: Tx channel configuration |
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* @filt_einfo: Filter extended packet info |
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* @filt_pswords: Filter PS words present |
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* @knav_dma_tx_priority: Tx channel scheduling priority |
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*/ |
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struct knav_dma_tx_cfg { |
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bool filt_einfo; |
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bool filt_pswords; |
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enum knav_dma_tx_priority priority; |
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}; |
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/** |
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* struct knav_dma_rx_cfg: Rx flow configuration |
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* @einfo_present: Extended packet info present |
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* @psinfo_present: PS words present |
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* @knav_dma_rx_err_mode: Error during buffer starvation |
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* @knav_dma_desc_type: Host or Monolithic desc |
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* @psinfo_at_sop: PS word located at start of packet |
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* @sop_offset: Start of packet offset |
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* @dst_q: Destination queue for a given flow |
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* @thresh: Rx flow size threshold |
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* @fdq[]: Free desc Queue array |
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* @sz_thresh0: RX packet size threshold 0 |
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* @sz_thresh1: RX packet size threshold 1 |
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* @sz_thresh2: RX packet size threshold 2 |
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*/ |
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struct knav_dma_rx_cfg { |
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bool einfo_present; |
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bool psinfo_present; |
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enum knav_dma_rx_err_mode err_mode; |
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enum knav_dma_desc_type desc_type; |
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bool psinfo_at_sop; |
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unsigned int sop_offset; |
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unsigned int dst_q; |
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enum knav_dma_rx_thresholds thresh; |
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unsigned int fdq[KNAV_DMA_FDQ_PER_CHAN]; |
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unsigned int sz_thresh0; |
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unsigned int sz_thresh1; |
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unsigned int sz_thresh2; |
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}; |
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/** |
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* struct knav_dma_cfg: Pktdma channel configuration |
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* @sl_cfg: Slave configuration |
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* @tx: Tx channel configuration |
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* @rx: Rx flow configuration |
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*/ |
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struct knav_dma_cfg { |
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enum dma_transfer_direction direction; |
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union { |
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struct knav_dma_tx_cfg tx; |
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struct knav_dma_rx_cfg rx; |
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} u; |
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}; |
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/** |
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* struct knav_dma_desc: Host packet descriptor layout |
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* @desc_info: Descriptor information like id, type, length |
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* @tag_info: Flow tag info written in during RX |
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* @packet_info: Queue Manager, policy, flags etc |
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* @buff_len: Buffer length in bytes |
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* @buff: Buffer pointer |
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* @next_desc: For chaining the descriptors |
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* @orig_len: length since 'buff_len' can be overwritten |
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* @orig_buff: buff pointer since 'buff' can be overwritten |
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* @epib: Extended packet info block |
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* @psdata: Protocol specific |
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* @sw_data: Software private data not touched by h/w |
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*/ |
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struct knav_dma_desc { |
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__le32 desc_info; |
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__le32 tag_info; |
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__le32 packet_info; |
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__le32 buff_len; |
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__le32 buff; |
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__le32 next_desc; |
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__le32 orig_len; |
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__le32 orig_buff; |
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__le32 epib[KNAV_DMA_NUM_EPIB_WORDS]; |
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__le32 psdata[KNAV_DMA_NUM_PS_WORDS]; |
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u32 sw_data[KNAV_DMA_NUM_SW_DATA_WORDS]; |
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} ____cacheline_aligned; |
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#if IS_ENABLED(CONFIG_KEYSTONE_NAVIGATOR_DMA) |
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void *knav_dma_open_channel(struct device *dev, const char *name, |
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struct knav_dma_cfg *config); |
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void knav_dma_close_channel(void *channel); |
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#else |
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static inline void *knav_dma_open_channel(struct device *dev, const char *name, |
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struct knav_dma_cfg *config) |
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{ |
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return (void *) NULL; |
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} |
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static inline void knav_dma_close_channel(void *channel) |
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{} |
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#endif |
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#endif /* __SOC_TI_KEYSTONE_NAVIGATOR_DMA_H__ */
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